Company lists · Data refreshed October 2026

Top 25 Distribution system testing companies based in the United States

RevenueBase identified 134 company matches for distribution system testing companies associated with the United States as of October 2026 and tracks 3,978 professional contacts across them, including 955 with verified work emails. Houston is the largest hub.

This list covers company matches for distribution system testing companies associated with the United States, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed October 11, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list RevenueBase SmartSearch · Exact Recorded Oct 11, 2026 How this list was built
134Companies
3,978Contacts tracked
955Verified emails
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The 25 largest distribution system testing companies based in the United States

Ranked by team size
Top 25 of 134 company matches for distribution system testing companies based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 11, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchTulsa, OK, United StatesHQ recorded Oct 11, 20261,001-5,000813 contacts →

Exact match

“Core capabilities include: Inspection Services (Chief, CWI, NACE/AMPP, Utility, Environmental, Safety, Poly, etc), Non-Destructive Examination (Ultrasonic Testing (UT), Phased…”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
2Exact matchMaryland Heights, MO, United StatesHQ recorded Oct 11, 2026501-1,000666 contacts →

Exact match

“Electric Power Systems is an independent electrical testing & engineering organization.”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
3Exact matchLeague City, TX, United StatesHQ recorded Oct 11, 2026201-500195 contacts →

Exact match

“Pro-Surve Technical Services is an advanced non-destructive testing and inspection company.”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
4Exact matchPasadena, TX, United StatesHQ recorded Oct 11, 2026501-1,000170 contacts →

Exact match

“The TechCorr name is synonymous with safe, quality inspection services.”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
5Exact matchSaint Rose, LA, United StatesHQ recorded Oct 11, 2026201-500132 contacts →

Exact match

“Since 1978, Coastal Gulf & International, Inc.(CGI) has been a trusted leader in independent inspection, testing, and technical services for the energy, petrochemical, and marine…”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
6Exact matchParma, MI, United StatesHQ recorded Oct 11, 2026201-500132 contacts →

Exact match

“JANX is a leader in nondestructive testing and inspection solutions with offices throughout the USA.”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
7Exact matchSouth Plainfield, NJ, United StatesHQ recorded Oct 11, 2026201-500120 contacts →

Exact match

“AEIS, LLC is a testing, inspection, and certification (TIC) agency that increases quality and safety outcomes for major infrastructure.”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
8Exact matchFort Worth, TX, United StatesHQ recorded Oct 11, 2026201-500112 contacts →

Exact match

“3B Inspection was founded in 2016 to provide dependable, high-quality inspection services for the oil and gas pipeline industry.”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
9Exact matchBlairsville, PA, United StatesHQ recorded Oct 11, 2026201-50091 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
10Exact matchBreckenridge, NV, United StatesHQ recorded Oct 11, 202651-20067 contacts →

Exact match

“C&L Inspection provides construction inspection for gas distribution, gas transmission, electric utility, and fiber optic utility programs.”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
11Exact matchNew Mexico, TX, United StatesHQ recorded Oct 11, 2026201-50064 contacts →

Exact match

“Pipeline inspection division of Legacy Safety & Consulting LLC.”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
12Exact matchConverse, TX, United StatesHQ recorded Oct 11, 202651-20059 contacts →

Exact match

“WELCOME Power Engineering Services is an Accredited, Full-Member of the International Electrical Testing Association (NETA), and a Registered Engineering Firm in 46 states.”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
13Exact matchIrving, TX, United StatesHQ recorded Oct 11, 202651-20056 contacts →

Exact match

“Principle Services is the most reliable inspection, project management, and compliance partner for today’s utility and power infrastructure leaders.”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
14Exact matchValparaiso, IN, United StatesHQ recorded Oct 11, 202651-20047 contacts →

Exact match

“CATSI is a leading provider of specialized inspection and technical services, primarily serving the oil and gas, pipeline, chemical, metals, and power industries.”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
15Exact matchLong Beach, CA, United StatesHQ recorded Oct 11, 202611-5044 contacts →

Exact match

“With over 22 years in the industry, Twining Consulting, has the project experience and industry resources to provide the most cost efficient testing, inspection and engineering…”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
16Exact matchMiddleton, WI, United StatesHQ recorded Oct 11, 202611-5043 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
17Exact matchWalnut Creek, CA, United StatesHQ recorded Oct 11, 202651-20040 contacts →

Exact match

“Clear Path Utility Solutions, a Celerity company, provides independent, boots on the ground field oversight that helps utilities improve execution, validate quality, reduce risk…”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
18Exact matchDurham, CT, United StatesHQ recorded Oct 11, 202651-20039 contacts →

Exact match

“EPST is a NETA Certified, Independent Electrical Testing & Engineering Organization.”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
19Exact matchTickfaw, LA, United StatesHQ recorded Oct 11, 202651-20038 contacts →

Exact match

“At Titan we are dedicated to keeping linemen safe through quality work and excellent customer service.”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
20Exact matchPasadena, CA, United StatesHQ recorded Oct 11, 202611-5035 contacts →

Exact match

“Our mission is to ensure that electrical power systems are safe, efficient and reliable.”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
21Exact matchOcala, FL, United StatesHQ recorded Oct 11, 202611-5034 contacts →

Exact match

“For over 35 years, MARS Company has proven itself in the waterworks industry as the leader in custom-designed and fabricated Water Meter Testing Systems.”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
22Exact matchIndianapolis, IN, United StatesHQ recorded Oct 11, 202651-20034 contacts →

Exact match

“The talented Field engineers at HIVOLT Advanced provide electrical testing and commissioning services in a safe and reliable manner.”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
23Exact matchSan Diego, CA, United StatesHQ recorded Oct 11, 202651-20032 contacts →

Exact match

“Our mission is to provide the highest industry standards through quality inspection & testing.”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
24Exact matchHumble, TX, United StatesHQ recorded Oct 11, 202611-5026 contacts →

Exact match

“Woyt Industries has extensive experience in the fields of project management, asset integrity, design verification and surveillance of manufactured/fabricated equipment, corrosion…”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
25Exact matchTulsa, OK, United StatesHQ recorded Oct 11, 202651-20023 contacts →

Exact match

“At Keystone Energy Group, our core commitment is to uphold the highest standards of quality, integrity and excellence in all our inspection services.”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase

Showing 25 of 134 distribution system testing companies based in the United States

See the full list, filter by size, metro and specialty, and access 955 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Distribution system testing companies based in the United States at a glance

As of Oct 11, 2026
24.0%Verified-email coverage
29.7Average contacts per company
11-50Median size (employees)
6.0%Largest-city concentration · Houston
Oct 11, 2026Page data refreshed

Companies by employee count

1-10
37
11-50
59
51-200
16
201-500
12
501-1,000
4
1,001-5,000
5

Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 134 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source
The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies
Company records associated with the United States whose business descriptions match “distribution system testing companies” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch
Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview
The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality
RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
Ranking
Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification
Every displayed company carries at least one verified work email. RevenueBase tracks 955 professional contacts with verified work emails across the full matched dataset. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh
This page's figures were pulled from the company graph on October 11, 2026. Lists refresh periodically as the graph is re-checked.
Record context
Company records and descriptions can change. Check the company's website for its current services and locations.

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “distribution system testing companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many distribution system testing companies are there based in the United States?

RevenueBase identified 134 company matches for distribution system testing companies associated with the United States as of October 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Tulsa Inspection Resources, LLC tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most distribution system testing companies?

Houston leads with 8 company records, followed by Tulsa (5) and Pasadena (3).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 955 professional contacts with verified work emails tracked across these 134 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on October 11, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase SmartSearch, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.